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Finding the Fourth Proportional to 20,521.32, 30,786.03 and 6,483.51

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Solution

The fourth proportional to 20,521.32, 30,786.03 and 6,483.51 is: 9,726.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    20,521.32 : 30,786.03 = 6,483.51 : x
  2. Step 2: Convert to fraction form
    20,521.32/30,786.03 = 6,483.51/x
  3. Step 3: Cross multiply
    20,521.32x = 30,786.03 × 6,483.51
  4. Step 4: Simplify right side
    20,521.32x = 199,601,533.37
  5. Step 5: Solve for x
    x = 199,601,533.37/20,521.32
  6. Step 6: Final answer
    x = 9,726.54

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.